North American Diptera. 37 



2(i. I'robosc'iti inufli loiifjiT than tlu' anti-miip ; small, Boinbylius- 



likc. pubosci'iit insects. Gerox 



Proboscis shorter than the antenna*; long A nmi oph i la-like, 

 almost fjlabrous insects; four basal segments of the abdomen 

 very narrow Ststropus 



"9 ficii- Geronis (auctor.) vel Dasypalpi (Macq. Dipt. Exot.) 

 satis vicinum, pra?cipue differt antennarum palporumque confor- 

 matione. 



"Corpore angustato, dorso thoracis gibboso, breviter et parce vil- 

 losulo ; capite fere sphivrico, thorace angustiore ; antennis basi 

 anguste approximatis, fronte lata, parum prominiila, genis, suborbi- 

 tis, angnstissimis ; proboscide rigido, i)orrccto, labris invisis anten- 

 nas longitudine superante; palpis hanstello subajque longis, gracili- 

 bus, porrectis, rigidis, fere cylindricis, segmento ultimo, villosiilo; 

 antennarum, capite longiorum, segmentis duo basalibus abbreviatis, 

 gracilibus, a-quilongis, 8°, prsecedentibus, simul suniptis, duplo 

 longiore, oblongo, basi leniter dilatato, compresso, apice obtuso, 

 superne villosiilo, ad apicem leniter sulciolato, chicto inviso ; alls, 

 abdoniine iiiiilto longioribus, cellulis posticis tribus, tribusque sub- 

 marginalibiis munitis, cunctis late apertis, anali ante niarginem 

 clausa, l)asali externa interna parum longiore, vena quarta longitu- 

 dinali (Konilani) bifurcata, vena transversali exteriui, ante medi- 

 um cellela' discoidalis satis elongata, locata." Hiiadopselaphus 



"Same as Anthrax except that the axillary cell is not longer 

 than twice the distance between the tips of the last two veins, and 

 the third basal cell is wider at its apex than at any other part. 

 Wings tai)ering considerably toward the bases, axillary cell very 

 narrow." Mancia 



"Antenna? porrect, third joint when viewed from the side scarcely 

 longel- than wide, somewhat oval in outline, but tapering to the tip, 

 which is ])lunt and bears a very short style, tipi)ed with a short bris- 

 tle ; first joint longer than the second, but not one half so long as 

 the third ; first two joints of nearly an equal width, not more than 

 one half as wide as the third at its base. Face retreating below, 

 bare except on oral margin. Head a little thicker than long, wider 

 than the thorax, and fully three-fourths as large. Thorax with bris- 

 tles in front of wings and on hind angles. Scutellum rounded be- 

 hind. Wings with two submarginal and four posterior cells, all of 

 the latter open, as is also the third basal; small cross-vein near 

 middle of discal cell ; furcation of second and third veins occurs 

 before jiroximal end of discal cell. All of the tibiae provided with 

 bristles; pulvilli pad-like." ...... Ei'cessia 



ExoPROSOi'A Macquart, Dipt. Exot. 11, 1, 35, 1840; Trinaria 



Mulsant. 

 Hykeralonia Rondani, Archivio per la Zool. Ill, 1864. 

 Stonyx Osten Sacken, Biologia Central! Americana, Diptera, 04, 



1886. 



